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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '864ea3408b64d8877fa8f4c611714ecef79f2fd645cee6779e4901651f9217c7' 
  AND token = 'q92Y0scVzvuU6LM+Wnj+S2NxObM6KvJXeEjo01xF1O8=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00023

JSON explain

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