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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'ebe5401e1f70a984abc5bf3ebff372befc70ea0c9696b1aa56db84498997cc69' 
  AND token = 'ScUDl8+OQbWUcU+wGk657BDfW/zciE+/XLabWIBojZ0=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00050

JSON explain

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