Sandbox

SELECT 
  1 
FROM 
  cscart_june_setuplock_keys 
WHERE 
  key_id = '1642960e19e66b40d61e7b5c605597fa738f23ef47cd7068dabba5d349604584' 
  AND token = 'jickOzWYpULDIeBWniuMM2n2nP1I0XJANy0eqOOZcOM=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00026

JSON explain

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