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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = 'aa6f67932a9e0b27e9047263d7921f5a8aaf41769602247d874ab3b3c6ebf7e9' 
  AND token = 'PVs4Di/RSLD9OAQGcifsoF+wkYBToh1y3YXj6kGdaFE=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00034

JSON explain

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