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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '8e4067c0a0211c11eb4331ef139ee62493f8a54194926fc2b6ec736cb537bf14' 
  AND token = 'NEoY71sPdUt6kcv17qEwZxzFYDOFZY+E0iMR5DG7gAs=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00038

JSON explain

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