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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = 'f341e0798c80b0bf2d673207bfb0005a114371275b43a4c5103a305ebd54b97c' 
  AND token = 'cTSbgeR976SiKtbmR6pHX0XIGOHK6kc5xBmt8P4BdVw=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00028

JSON explain

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