Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '8a628e657025c69d450501f6621a23f0d862003cbf7933bf637b32cc76c2999e' 
  AND token = 'PwGcsqArOmxs0hLXjXssf9l2aeOEcoR7djFM467No+w=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00010

JSON explain

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