Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'c20b37f23c8b2126e789e7bebec19ab2fb2d4262441c4ac84abe0d9d94f7a688' 
  AND token = 'w30MQwXINJTtiRZIdhmqNA9irhlzX79FGOiSwJjW24Q=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00025

JSON explain

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