Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '008347576f90d1c5027233405d36f3772b57e6cdcea7a38a2303e56304927eb1' 
  AND token = 'q1hrrg9pzuIT/1bZAUziVNe/kVFyCOmv1Za6OyxOcvU=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00042

JSON explain

{
  "query_block": {
    "select_id": 1,
    "table": {
      "message": "Impossible WHERE noticed after reading const tables"
    }
  }
}