Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'c4ddfb613969e398f920598c5ef896ae183ba5c89bc12128c2404df7d1327574' 
  AND token = 'UVXHDjoA3F0uzH4eGiBlRrdPWxddJmxa9oSYhb6Vcbc=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00018

JSON explain

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