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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'a0d177debbda75224d18c5666b448ffce719068314f9d79e9c4f718c8d76ab26' 
  AND token = 'ILWAK0DxToCLq/cbY9NayCrl0FAO50PRmPpuy53BVI4=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.21691

JSON explain

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