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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '0235b1a3bf2b68f6aad5f7f354b2959f7776be6dcf768766c20dc42b405ab1cf' 
  AND token = 'aGXon4t+WwrWMI3NXPbC6kvNelTwGV62AgZUCHvsJdU=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00030

JSON explain

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