Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'febe3d8cfe023b3476f35c95c4479bf8b7eadb34f2b029ce5fe943317a0583e5' 
  AND token = 'k01mCKR2FU26ZxB2GWqkHjOlp79n3WT707urUZWvh+I=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00019

JSON explain

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