SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'd395a361151c2dc01b5c1b589cbc88f82f7e418a5c5b45714257ffac3d00b0f9' 
  AND token = 'Q6aCbwF763K/8EIom+bCVUo/HzquBZgB6waxHmbDPvk=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00040

JSON explain

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