Sandbox

SELECT 
  1 
FROM 
  cscart_june_setuplock_keys 
WHERE 
  key_id = 'e36baaa00db2b16e892f2ae79d0c1715f6f1d5e0e4d9f97cbb1e646657a4f6af' 
  AND token = 'zMAQNRqxXGLzFMHWeZ+hlSUiyGOoR+F9y1oJ4pnb1T8=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00024

JSON explain

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