SELECT 
  1 
FROM 
  cscart_june_setuplock_keys 
WHERE 
  key_id = 'f88409c9715968efa7f296ec7c8cdca64f40ac16eb752205d1cf81c98ff82772' 
  AND token = 'RzQHGovZumjBDYG6tKxcoMLIiL0KQzxNDLX4ZKEXUxA=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00024

JSON explain

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