SELECT 
  1 
FROM 
  cscart_june_setuplock_keys 
WHERE 
  key_id = 'c7119bebd92d6bf4a45dc37e38457e1e826c83e0f725ec4985e169a2580c6096' 
  AND token = 'VfmX/Uv2UEQThGib+WZXoaWQgyT4KJZYGYICb6l2V3g=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00025

JSON explain

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