Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '48462be11a2653c8bebe5dd7363ffc820a563a61a0dd674ff57c9eb9d2f2d5a2' 
  AND token = 'njtzG/Tz+TeOzyV9ijKyZD8Hgdiy8NI2Zfy/yRs2tyE=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00032

JSON explain

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