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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '1962eabbc8e372e13bb27190016f48013061de95f70c91ed7c055817313bb486' 
  AND token = 'tN6XYI9LV16t4VkL6ZA/dz7LoDm6ShTK1T/hdxsa358=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00030

JSON explain

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