Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'bcf2266479fb9bb25a9332128d1b13eb09883e31dbafa7054b09cc8ae2decf60' 
  AND token = 't7i6HlT/b3ORJuWBo0AFeaJ13P8+n8aibLTt3ebOW9c=' 
  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"
    }
  }
}