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SELECT 
  1 
FROM 
  vi_lock_keys 
WHERE 
  key_id = '8b3950cf134a11958e15ed15b6c818d2607ef1da8246861c90ba8e16ef6aef9e' 
  AND token = 'C5WJSfDbzFt1Gu+8PBrimBcvz574LKazpaGoUSjOius=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00011

JSON explain

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