Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '8328a7f04beb46dffce7e9139d5c2b0c6bb346188e8ef659d739d72a1ad70cd0' 
  AND token = 'KAb+yy3VdPl3I2FdpR2ZTixsK5tTmcFQ30TU8NntU3w=' 
  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"
    }
  }
}