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SELECT 
  1 
FROM 
  vi_lock_keys 
WHERE 
  key_id = 'd8d4e87e5894166951c3ff01ed7d99595f6c1b7fe0f9af0feecd8afe60fd3105' 
  AND token = 'vG3LgL5echduM06UIqfoUncAMgLGGHoWsErdHildaAs=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00017

JSON explain

{
  "query_block": {
    "select_id": 1,
    "table": {
      "message": "Impossible WHERE noticed after reading const tables"
    }
  }
}