Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'f1ccbaa63e54cb2153a3e8c36efc1ad8fc762a82edd8f209a76bf69b2fbc90b8' 
  AND token = 'oarA7HnA3F+XMEI6svjQwcVYmU88n1PLP9LwwSvFTwI=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00030

JSON explain

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