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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '1f006eb73b008f37b8da60940ba02aa53a03b2c48d959ff56fc17be46140cff1' 
  AND token = 'utgguCxqn0af8dAUUkoBAaA5QCaViKvriZ0xKeH2A94=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00083

JSON explain

{
  "query_block": {
    "select_id": 1,
    "message": "no matching row in const table"
  }
}