Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '88216dc23230a3642f230fa59f1c6e6c3ba65cce46e6b231d21c4f8c62f16fa5' 
  AND token = 'NVynJZIVTvaTznAoGd+iTSqeL2iQp+xHMKsk64TaK7g=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00041

JSON explain

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