Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '0937b741a841dc21ed2220caf7a401f9eee5de5757e5f870bc67b3e7cd0d9f2c' 
  AND token = 'ETrCiPGNm7tLGyGJzq6+RrUPORxpNWMurpuwH1a/ujE=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00019

JSON explain

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