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SELECT 
  1 
FROM 
  cscart_multi_declock_keys 
WHERE 
  key_id = '84758150da6c76832028c5cd96c621fb69bcf0fbb004de2b891532ef38aa998d' 
  AND token = 'yupvr8tzk0U2dqQlAF/9tlOaQC99hDrXIz7j95aWEOg=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00023

JSON explain

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