SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '062199cdf3c95e3fd58bd02e29254f6828b0549c6a28b19d4cc2aae4e0085142' 
  AND token = 'BzfKGUJHQLj19XDbKVrooHEBh6hL2/mLpvTKuRa7A8w=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00044

JSON explain

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