Sandbox

SELECT 
  1 
FROM 
  cscart_june_setuplock_keys 
WHERE 
  key_id = '974e7d1738a640d5c15070a1dad0caf877e23d6773d97abe9681d938a3deee3a' 
  AND token = 'w0T72a8WsNiMkU1DfKEUSgWv6neZpkr3GoA7aal80DQ=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00039

JSON explain

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