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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '9a0e3f111c11bafb079d8d9a6ddd86a1fbd572e2f5828d201c8d0ef98e245654' 
  AND token = 'gAKS5LeyYhF/HNJf/f4fAjJFvIClePjQWlWrbOD7p9c=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00031

JSON explain

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