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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '00edcc2d45877b0ea0fcdd38994b12b84eb14df85622a8c409e8065eaf34a8ae' 
  AND token = 'C7ddzChCYYJqOpw8lXp8soEY+DoxcPjn3gA53hBIPrM=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00013

JSON explain

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