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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '14297e830eac41ee206159d4d4958ef847ef24e1af96132289c6e19a166f2538' 
  AND token = 'h2Gukj/5MZJ8Ewt11X8ksAfNYag4Whprd29MI10LRGM=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00031

JSON explain

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