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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = 'c4905a1e9e4df68e16e5c1ea9109d920e006b6cb45531b67b46347395bb6aaa2' 
  AND token = '8VR8/MLq+RfiVPXSYP0OwFth+WoaM+41Ftqjc1DSiww=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00149

JSON explain

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