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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '99d5ecb81df9eafef2ef8397bef90f5536ede7f98749ea32357e03bcf3c778be' 
  AND token = 'h72SfIEm21bMuE6f/tpIe5OPhqX38I15Sd2a7sr6IlI=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00028

JSON explain

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