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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '64340a4365888afa9a6a9a4ba58f26360e9bbe6806725c17ead30e8ffdda46e8' 
  AND token = 'vSO0QorYCjkDIx0pgt9qibqK18TfmY/4WQ9S7RyBofg=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00035

JSON explain

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