Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'c28400faec3bd0596b3e329baba46803037bdd0b5a6369652a94ca606768fc28' 
  AND token = 'pD2cDr3k3Ja6W6mJ2XnEo3GNANTyI8Bzk4mOMFyjhF4=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00034

JSON explain

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