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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '05bd98badb51458550bf4076432b0a8fdb88b5c6f27e870279587939f5907824' 
  AND token = 'jdAda26Oo3yLbUiCbQe8wTc8z254/wF3VIOx4SIihfk=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00030

JSON explain

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