Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'f5bf3f933f29e0549ed8936dca051f6b6bb193caca694853efdbfd670d4ce927' 
  AND token = 'EiVM9QTsG3SVs8XqTdj0Q/oLMp1PN+3fIR42JSKmR9I=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00051

JSON explain

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