Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '3630a000936c5cbf34a762a22e8b36752156376c89144554fdae8ec4e66235ec' 
  AND token = 'U1Oy3fhM72cY5s7JML0yV0IK0IWSz15N6jMRgpWz0T8=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00037

JSON explain

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