Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '6b7ee0d3256c90a1bb16ff2e9ee7396062390f1db13d595b394686f7e3f8dd31' 
  AND token = 'yEvhQES+0bja8/1qfhUUQihSqI4Lz07JLtC6Ey6UyDc=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00042

JSON explain

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