Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '331a05d288a2dcecf5eac2b3f9463a820e8e92708bb3c0fbb1553ba2ee3a302a' 
  AND token = 'XeOGlkFzAT0g+rNPGVJTYQ8HskmkfVs2pmpI8fxf0p8=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00038

JSON explain

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