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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'a0a1dfe52563898544803610bb9ee43af912efc1d187576aad5158be0eed599f' 
  AND token = '/uGn/t+qJKHe8v8sDnnE+3SjiqxtV5QYnq6lHCg54OQ=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00019

JSON explain

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