Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '129990fcb6d1ae09626b209c40b2ef14bc62a019f631d57b020054f12f8d2cf6' 
  AND token = '16WwEOHg3/Vf/DT1sQ67bMnSLyZFQv5cN0yo96ZP2q4=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00030

JSON explain

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