SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '7dd886efc468a3507c38707513edaf11fdc30c61c6b894e3bb29ec6f19811322' 
  AND token = 'y0JwpGyKp2vyAJiwBaFZeKCoGj6d94VCKMaQGzFZEmM=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00022

JSON explain

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