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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '005807b980c1711faa5829f8a115d9b8dc871bcb5a02cc1d89d973f02e9ed772' 
  AND token = 'tfqlHAOCjMgA7rYBDC2vkxNdtfaUOkbqaijbLOxGnnk=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00030

JSON explain

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