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SELECT 
  1 
FROM 
  vi_lock_keys 
WHERE 
  key_id = 'c4e77f03c8138b2f13a1b5d7c77a0c43985878e84de01d611d57b1a2620fe14a' 
  AND token = 's04G+tF1R5OtGOLFgbBO4NztitbiYp9kuz6buuIcinY=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00009

JSON explain

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