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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '3e7773c007be058c4e538418c054d2fbaab2562e3fef5c9e115e8fd4ca81a689' 
  AND token = 'Cgz/KY9edSKQHXSyreyJgITnP0TFppYi5SSKilwC/oY=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00030

JSON explain

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