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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'c0de73210b371ab51a6634fc2f78b7cd326c91eca671924bf017ba4ef2e74360' 
  AND token = 'jKR1fRTw3Svp1XOFtN/r7unnur1iPcNp/0Kg5SOM0Qo=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00029

JSON explain

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