Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '186669f1b5e9d342332c4f8ce7ab2fdbbcfba9562fea433114155ffabe5b2f1c' 
  AND token = 's1654+TAl2Og1GYytFoUmwvz3yyRqmv050WyPLJAY8w=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00024

JSON explain

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