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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '4513b757c8526c60f7d31591f0a688420a88c1022d39e3df0ea0d3ffc27e9f89' 
  AND token = 'DyuBG0l3sw9kCIyLygt3TAspqSDvuMw26Rx9p3oTxeE=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00036

JSON explain

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