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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'd3e6f4dfccbefad0d3e72b4fa368ba5f3bc1665f1ff7092519aa34af9ef81691' 
  AND token = '734zPFVye3s9FMBVV204CrlvAGL7N4wyt0cFfSSuEu8=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00166

JSON explain

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