Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '73ddc996abab0a19d35995b7f292b6a2d7bc3cbc04ef204bdf8b3bda679e895b' 
  AND token = 'vMth7HkbP/EICaVLRyfUWQR34p5/YI1XPdu0ey6x4hs=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00048

JSON explain

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