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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '2f2a2e16e2fa415376a50368071e544b7167cf337d6d6211df7abef4ab7ef068' 
  AND token = 'VLh3Q+32hXzekz+pec1MhsDooYoTk0GAXOVo11LPDeg=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00019

JSON explain

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