Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'c2e462c48b63ed0f14d177178d54a21f812682243c9cb7789d7a9a308e709c11' 
  AND token = 'OpGRkyx2Dbdq6NIKwL7CU8B+xsa5GVVso34Jerl2hyg=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00019

JSON explain

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