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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '19b139d0b324e92142552855e07cd07a8989e45286528e00eab5e954afaa5ea9' 
  AND token = 'B33SAH1qytXNf+6MCR+f9g/QpSXKGBp6JLoq9PU+H8g=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00036

JSON explain

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