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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '582355b2991069a38eb88c78ae7ec39236cb954fa7c5966a8a34c41816915a72' 
  AND token = 'n5cjm2x9zLqyIUMEAXbvfkxtSJ6nBLvDcCt97rQ2IyM=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00033

JSON explain

{
  "query_block": {
    "select_id": 1,
    "message": "no matching row in const table"
  }
}